Chapter 3.9, Problem 3.20CP

Explanation of Solution

cos():

The C++ library function, “cos()” returns the cosine of an argument.

• To use the “cos()” function, the “cmath” header file is required
• The “cos()” function is useful in some of the scientific and other special-purpose programs.
• The argument and the return type of the “cos()” is double.

Example:

b = cos(a);

Explanation:

“b” is a variable which contains the result of a cosine of the argument where “a” is a argument.

log():

Log is an “inverse operation” to exponentiation.

• To use the “log()” function, the “cmath” header file is required.
• Log returns the “natural logarithm” of argument.
• The argument and the return type of the “log()” is double.

Example:

b = log(a);

Explanation:

“b” is a variable which contains the result of a natural logarithm of the argument where “a” is a argument.

sin():

The C++ library function, “sin()” returns the sine of an angle.

• To use the “sin()” function, the “cmath” header file is required.
• The “sin()” function is useful in some of the scientific and other special-purpose programs.
• The argument and the return type of the “sin()” is double.

Example:

b = sin(a);

Explanation:

“b” is a variable which contains the result of a sine of the argument where “a” is a argument.

exp():

The  C++ library function, “exp()” returns exponential function of an argument.

• To use the “exp()” function, the “cmath” header file is required.
• The “exp()” function is useful in some of the scientific and other special-purpose programs.
• The argument and the return type of the “exp()” is double.

Example:

b = exp(a);

Explanation:

“b” is a variable which contains the result of an exponent of the argument where “a” is an argument.

log10():

Log is an “inverse operation” to exponentiation.

• To use the “log10()” function, the “cmath” header file is required.
• Log10 returns the “base -10 logarithm” of argument.
• The argument and the return type of the “log10()” is double.

Example:

b = log10(a);

Explanation:

“b” is a variable which contains the result of a base-10 logarithm of the argument where “a” is a argument...